Answer all the questions if possible, due also, is what i did for the top answer right?

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

Apiling for a high-rise building is pushed by two bulldozers at exactly the same time. one bulldozer exerts a force of 1250 pounds in a westerly direction. the other bulldozer pushes the piling with a force of 2650 pounds in a northerly direction. what is the direction of the resulting force upon the piling, to the nearest degree? a. 65 n of w b. 25 n of w c. 45 n of w d. 35 n of w